If the requisition lines does not have Procurement BU derived from Source Agreement/Buyer at the time of Requisition creation, then the Generate Orders program will not be submitted automatically. Hence the users have to launch the Generated Orders ESS program separately to process these requisitions. The Requisition Approval process will automatically trigger the 'Generate Orders' process if procurement BU is assigned at the time of requisition creation. Use the Fusion Purchasing task link "Generate Orders" to process requisitions without Procurement BU sourced information.